/*!
 * Bootstrap's Gruntfile
 * http://getbootstrap.com
 * Copyright 2013-2016 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 */

module.exports = function (grunt) {
    'use strict';

    // Force use of Unix newlines
    grunt.util.linefeed = '\n';

    RegExp.quote = function (string) {
        return string.replace(/[-\\^$*+?.()|[\]{}]/g, '\\$&');
    };

    var fs = require('fs');
    var path = require('path');
    var generateGlyphiconsData = require('./grunt/bs-glyphicons-data-generator.js');
    var BsLessdocParser = require('./grunt/bs-lessdoc-parser.js');
    var getLessVarsData = function () {
        var filePath = path.join(__dirname, 'less/variables.less');
        var fileContent = fs.readFileSync(filePath, {encoding: 'utf8'});
        var parser = new BsLessdocParser(fileContent);
        return {sections: parser.parseFile()};
    };
    var generateRawFiles = require('./grunt/bs-raw-files-generator.js');
    var generateCommonJSModule = require('./grunt/bs-commonjs-generator.js');
    var configBridge = grunt.file.readJSON('./grunt/configBridge.json', {encoding: 'utf8'});

    Object.keys(configBridge.paths).forEach(function (key) {
        configBridge.paths[key].forEach(function (val, i, arr) {
            arr[i] = path.join('./docs/assets', val);
        });
    });

    // Project configuration.
    grunt.initConfig({

        // Metadata.
        pkg: grunt.file.readJSON('package.json'),
        banner: '/*!\n' +
        ' * Bootstrap v<%= pkg.version %> (<%= pkg.homepage %>)\n' +
        ' * Copyright 2011-<%= grunt.template.today("yyyy") %> <%= pkg.author %>\n' +
        ' * Licensed under the <%= pkg.license %> license\n' +
        ' */\n',
        jqueryCheck: configBridge.config.jqueryCheck.join('\n'),
        jqueryVersionCheck: configBridge.config.jqueryVersionCheck.join('\n'),

        // Task configuration.
        clean: {
            dist: 'dist',
            docs: 'docs/dist'
        },

        jshint: {
            options: {
                jshintrc: 'js/.jshintrc'
            },
            grunt: {
                options: {
                    jshintrc: 'grunt/.jshintrc'
                },
                src: ['Gruntfile.js', 'package.js', 'grunt/*.js']
            },
            core: {
                src: 'js/*.js'
            },
            test: {
                options: {
                    jshintrc: 'js/tests/unit/.jshintrc'
                },
                src: 'js/tests/unit/*.js'
            },
            assets: {
                src: ['docs/assets/js/src/*.js', 'docs/assets/js/*.js', '!docs/assets/js/*.min.js']
            }
        },

        jscs: {
            options: {
                config: 'js/.jscsrc'
            },
            grunt: {
                src: '<%= jshint.grunt.src %>'
            },
            core: {
                src: '<%= jshint.core.src %>'
            },
            test: {
                src: '<%= jshint.test.src %>'
            },
            assets: {
                options: {
                    requireCamelCaseOrUpperCaseIdentifiers: null
                },
                src: '<%= jshint.assets.src %>'
            }
        },

        concat: {
            options: {
                banner: '<%= banner %>\n<%= jqueryCheck %>\n<%= jqueryVersionCheck %>',
                stripBanners: false
            },
            bootstrap: {
                src: [
                    'js/transition.js',
                    'js/alert.js',
                    'js/button.js',
                    'js/carousel.js',
                    'js/collapse.js',
                    'js/dropdown.js',
                    'js/modal.js',
                    'js/tooltip.js',
                    'js/popover.js',
                    'js/scrollspy.js',
                    'js/tab.js',
                    'js/affix.js'
                ],
                dest: 'dist/js/<%= pkg.name %>.js'
            }
        },

        uglify: {
            options: {
                compress: {
                    warnings: false
                },
                mangle: true,
                preserveComments: /^!|@preserve|@license|@cc_on/i
            },
            core: {
                src: '<%= concat.bootstrap.dest %>',
                dest: 'dist/js/<%= pkg.name %>.min.js'
            },
            customize: {
                src: configBridge.paths.customizerJs,
                dest: 'docs/assets/js/customize.min.js'
            },
            docsJs: {
                src: configBridge.paths.docsJs,
                dest: 'docs/assets/js/docs.min.js'
            }
        },

        qunit: {
            options: {
                inject: 'js/tests/unit/phantom.js'
            },
            files: 'js/tests/index.html'
        },

        less: {
            compileCore: {
                options: {
                    strictMath: true,
                    sourceMap: true,
                    outputSourceFiles: true,
                    sourceMapURL: '<%= pkg.name %>.css.map',
                    sourceMapFilename: 'dist/css/<%= pkg.name %>.css.map'
                },
                src: 'less/bootstrap.less',
                dest: 'dist/css/<%= pkg.name %>.css'
            },
            compileTheme: {
                options: {
                    strictMath: true,
                    sourceMap: true,
                    outputSourceFiles: true,
                    sourceMapURL: '<%= pkg.name %>-theme.css.map',
                    sourceMapFilename: 'dist/css/<%= pkg.name %>-theme.css.map'
                },
                src: 'less/theme.less',
                dest: 'dist/css/<%= pkg.name %>-theme.css'
            }
        },

        autoprefixer: {
            options: {
                browsers: configBridge.config.autoprefixerBrowsers
            },
            core: {
                options: {
                    map: true
                },
                src: 'dist/css/<%= pkg.name %>.css'
            },
            theme: {
                options: {
                    map: true
                },
                src: 'dist/css/<%= pkg.name %>-theme.css'
            },
            docs: {
                src: ['docs/assets/css/src/docs.css']
            },
            examples: {
                expand: true,
                cwd: 'docs/examples/',
                src: ['**/*.css'],
                dest: 'docs/examples/'
            }
        },

        csslint: {
            options: {
                csslintrc: 'less/.csslintrc'
            },
            dist: [
                'dist/css/bootstrap.css',
                'dist/css/bootstrap-theme.css'
            ],
            examples: [
                'docs/examples/**/*.css'
            ],
            docs: {
                options: {
                    ids: false,
                    'overqualified-elements': false
                },
                src: 'docs/assets/css/src/docs.css'
            }
        },

        cssmin: {
            options: {
                // TODO: disable `zeroUnits` optimization once clean-css 3.2 is released
                //    and then simplify the fix for https://github.com/twbs/bootstrap/issues/14837 accordingly
                compatibility: 'ie8',
                keepSpecialComments: '*',
                sourceMap: true,
                sourceMapInlineSources: true,
                advanced: false
            },
            minifyCore: {
                src: 'dist/css/<%= pkg.name %>.css',
                dest: 'dist/css/<%= pkg.name %>.min.css'
            },
            minifyTheme: {
                src: 'dist/css/<%= pkg.name %>-theme.css',
                dest: 'dist/css/<%= pkg.name %>-theme.min.css'
            },
            docs: {
                src: [
                    'docs/assets/css/ie10-viewport-bug-workaround.css',
                    'docs/assets/css/src/pygments-manni.css',
                    'docs/assets/css/src/docs.css'
                ],
                dest: 'docs/assets/css/docs.min.css'
            }
        },

        csscomb: {
            options: {
                config: 'less/.csscomb.json'
            },
            dist: {
                expand: true,
                cwd: 'dist/css/',
                src: ['*.css', '!*.min.css'],
                dest: 'dist/css/'
            },
            examples: {
                expand: true,
                cwd: 'docs/examples/',
                src: '**/*.css',
                dest: 'docs/examples/'
            },
            docs: {
                src: 'docs/assets/css/src/docs.css',
                dest: 'docs/assets/css/src/docs.css'
            }
        },

        copy: {
            fonts: {
                expand: true,
                src: 'fonts/**',
                dest: 'dist/'
            },
            docs: {
                expand: true,
                cwd: 'dist/',
                src: [
                    '**/*'
                ],
                dest: 'docs/dist/'
            }
        },

        connect: {
            server: {
                options: {
                    port: 3000,
                    base: '.'
                }
            }
        },

        jekyll: {
            options: {
                bundleExec: true,
                config: '_config.yml',
                incremental: false
            },
            docs: {},
            github: {
                options: {
                    raw: 'github: true'
                }
            }
        },

        htmlmin: {
            dist: {
                options: {
                    collapseBooleanAttributes: true,
                    collapseWhitespace: true,
                    conservativeCollapse: true,
                    decodeEntities: false,
                    minifyCSS: {
                        compatibility: 'ie8',
                        keepSpecialComments: 0
                    },
                    minifyJS: true,
                    minifyURLs: false,
                    processConditionalComments: true,
                    removeAttributeQuotes: true,
                    removeComments: true,
                    removeOptionalAttributes: true,
                    removeOptionalTags: true,
                    removeRedundantAttributes: true,
                    removeScriptTypeAttributes: true,
                    removeStyleLinkTypeAttributes: true,
                    removeTagWhitespace: false,
                    sortAttributes: true,
                    sortClassName: true
                },
                expand: true,
                cwd: '_gh_pages',
                dest: '_gh_pages',
                src: [
                    '**/*.html',
                    '!examples/**/*.html'
                ]
            }
        },

        pug: {
            options: {
                pretty: true,
                data: getLessVarsData
            },
            customizerVars: {
                src: 'docs/_pug/customizer-variables.pug',
                dest: 'docs/_includes/customizer-variables.html'
            },
            customizerNav: {
                src: 'docs/_pug/customizer-nav.pug',
                dest: 'docs/_includes/nav/customize.html'
            }
        },

        htmllint: {
            options: {
                ignore: [
                    'Attribute "autocomplete" not allowed on element "button" at this point.',
                    'Attribute "autocomplete" is only allowed when the input type is "color", "date", "datetime", "datetime-local", "email", "hidden", "month", "number", "password", "range", "search", "tel", "text", "time", "url", or "week".',
                    'Element "img" is missing required attribute "src".'
                ]
            },
            src: '_gh_pages/**/*.html'
        },

        watch: {
            src: {
                files: '<%= jshint.core.src %>',
                tasks: ['jshint:core', 'qunit', 'concat']
            },
            test: {
                files: '<%= jshint.test.src %>',
                tasks: ['jshint:test', 'qunit']
            },
            less: {
                files: 'less/**/*.less',
                tasks: 'less'
            }
        },

        'saucelabs-qunit': {
            all: {
                options: {
                    build: process.env.TRAVIS_JOB_ID,
                    throttled: 10,
                    maxRetries: 3,
                    maxPollRetries: 4,
                    urls: ['http://127.0.0.1:3000/js/tests/index.html?hidepassed'],
                    browsers: grunt.file.readYAML('grunt/sauce_browsers.yml')
                }
            }
        },

        exec: {
            npmUpdate: {
                command: 'npm update'
            }
        },

        compress: {
            main: {
                options: {
                    archive: 'bootstrap-<%= pkg.version %>-dist.zip',
                    mode: 'zip',
                    level: 9,
                    pretty: true
                },
                files: [
                    {
                        expand: true,
                        cwd: 'dist/',
                        src: ['**'],
                        dest: 'bootstrap-<%= pkg.version %>-dist'
                    }
                ]
            }
        }

    });


    // These plugins provide necessary tasks.
    require('load-grunt-tasks')(grunt, {scope: 'devDependencies'});
    require('time-grunt')(grunt);

    // Docs HTML validation task
    grunt.registerTask('validate-html', ['jekyll:docs', 'htmllint']);

    var runSubset = function (subset) {
        return !process.env.TWBS_TEST || process.env.TWBS_TEST === subset;
    };
    var isUndefOrNonZero = function (val) {
        return val === undefined || val !== '0';
    };

    // Test task.
    var testSubtasks = [];
    // Skip core tests if running a different subset of the test suite
    if (runSubset('core') &&
        // Skip core tests if this is a Savage build
        process.env.TRAVIS_REPO_SLUG !== 'twbs-savage/bootstrap') {
        testSubtasks = testSubtasks.concat(['dist-css', 'dist-js', 'csslint:dist', 'test-js', 'docs']);
    }
    // Skip HTML validation if running a different subset of the test suite
    if (runSubset('validate-html') &&
        // Skip HTML5 validator on Travis when [skip validator] is in the commit message
        isUndefOrNonZero(process.env.TWBS_DO_VALIDATOR)) {
        testSubtasks.push('validate-html');
    }
    // Only run Sauce Labs tests if there's a Sauce access key
    if (typeof process.env.SAUCE_ACCESS_KEY !== 'undefined' &&
        // Skip Sauce if running a different subset of the test suite
        runSubset('sauce-js-unit') &&
        // Skip Sauce on Travis when [skip sauce] is in the commit message
        isUndefOrNonZero(process.env.TWBS_DO_SAUCE)) {
        testSubtasks.push('connect');
        testSubtasks.push('saucelabs-qunit');
    }
    grunt.registerTask('test', testSubtasks);
    grunt.registerTask('test-js', ['jshint:core', 'jshint:test', 'jshint:grunt', 'jscs:core', 'jscs:test', 'jscs:grunt', 'qunit']);

    // JS distribution task.
    grunt.registerTask('dist-js', ['concat', 'uglify:core', 'commonjs']);

    // CSS distribution task.
    grunt.registerTask('less-compile', ['less:compileCore', 'less:compileTheme']);
    grunt.registerTask('dist-css', ['less-compile', 'autoprefixer:core', 'autoprefixer:theme', 'csscomb:dist', 'cssmin:minifyCore', 'cssmin:minifyTheme']);

    // Full distribution task.
    grunt.registerTask('dist', ['clean:dist', 'dist-css', 'copy:fonts', 'dist-js']);

    // Default task.
    grunt.registerTask('default', ['clean:dist', 'copy:fonts', 'test']);

    grunt.registerTask('build-glyphicons-data', function () {
        generateGlyphiconsData.call(this, grunt);
    });

    // task for building customizer
    grunt.registerTask('build-customizer', ['build-customizer-html', 'build-raw-files']);
    grunt.registerTask('build-customizer-html', 'pug');
    grunt.registerTask('build-raw-files', 'Add scripts/less files to customizer.', function () {
        var banner = grunt.template.process('<%= banner %>');
        generateRawFiles(grunt, banner);
    });

    grunt.registerTask('commonjs', 'Generate CommonJS entrypoint module in dist dir.', function () {
        var srcFiles = grunt.config.get('concat.bootstrap.src');
        var destFilepath = 'dist/js/npm.js';
        generateCommonJSModule(grunt, srcFiles, destFilepath);
    });

    // Docs task.
    grunt.registerTask('docs-css', ['autoprefixer:docs', 'autoprefixer:examples', 'csscomb:docs', 'csscomb:examples', 'cssmin:docs']);
    grunt.registerTask('lint-docs-css', ['csslint:docs', 'csslint:examples']);
    grunt.registerTask('docs-js', ['uglify:docsJs', 'uglify:customize']);
    grunt.registerTask('lint-docs-js', ['jshint:assets', 'jscs:assets']);
    grunt.registerTask('docs', ['docs-css', 'lint-docs-css', 'docs-js', 'lint-docs-js', 'clean:docs', 'copy:docs', 'build-glyphicons-data', 'build-customizer']);
    grunt.registerTask('docs-github', ['jekyll:github', 'htmlmin']);

    grunt.registerTask('prep-release', ['dist', 'docs', 'docs-github', 'compress']);
};
